<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      #canvas {
        border: 1px solid;
      }
    </style>
  </head>

  <body>
    <canvas width="400" height="400" id="canvas"> 请升级你的服务器 </canvas>
    <script>
      var canvas = document.querySelector("#canvas");
      var context = canvas.getContext("2d");

      context.font = "50px sans-serif";
      context.textAlign = "center";
      context.textBaseline='middle'; // 基线
      context.direction='rtl';
      
      
      context.fillText('中国队加油！', 200, 200);
      
    </script>
  </body>
</html>
